just to confuse you, mustangs use- well the old foxes used Modified McPherson struts. basically a non coil over setup or a wishbone in fwd.
McPherson struts simply are shocks that also double up in duties and assume the duties of the upper control arm and upper ball joint. The lower end is located by a lower control arm, either a wish bone or simple arm and strut to locate it. Thus there are three points which locate the suspension, and the steering axis is the center of the shock.
A McPherson strut is a McPherson strut wheather or not it uses a coil wrapped around the shock (strut
) or a coil located between the lower control arm or even a torsion barfor spring.
Our cars do have front shocks which carry the front coil spring wrapped around it, it has a large center shaft, but while it may look like a McPherson strut out the box, it is simply a shock absorber. The steering axis is not prescribed by it, it does not locate the front wheel hub or spindle, it has nothing to do with direction of travel.
My '85 has McPherson strut front suspension with the coil spring located between lower control arm and frame. It has the one ball joint where the spindle attaches to the lower control arm, the top of the spindle being attached to the strut with two bolts. The upper mount is adjustable to help set allignment, but it does not rotate. Rotation to steer the car is simply the lower part of the strut rotating around the center rod. My Koni struts have a tang where you place a knob to adjust rate, it's on the end of the rod under the hood.